CN111492173B - Projection device for a motor vehicle headlight - Google Patents
Projection device for a motor vehicle headlight Download PDFInfo
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- CN111492173B CN111492173B CN201880078628.XA CN201880078628A CN111492173B CN 111492173 B CN111492173 B CN 111492173B CN 201880078628 A CN201880078628 A CN 201880078628A CN 111492173 B CN111492173 B CN 111492173B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/265—Composite lenses; Lenses with a patch-like shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
- F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
- F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to a projection device (1) for a motor vehicle headlight, wherein the projection device (1) is provided for imaging light of at least one light source (2) associated with the projection device (1) in the region in front of the motor vehicle in the form of at least one light distribution, wherein the total number of low beam micro-optical lens groups comprises at least two groups of low beam micro-optical lens groups.
Description
Technical Field
The invention relates to a projection device for a motor vehicle headlight, wherein the projection device is provided for imaging light of at least one light source associated with the projection device in the region in front of the motor vehicle in the form of at least one light distribution, namely a low beam light distribution, wherein the projection device comprises:
-an incident optical lens group having a total number of micro-incident optical lens groups (3 a) preferably arranged in an array,
-an exit optical lens group having a total number of micro exit optical lens groups (4 a), preferably arranged in an array, wherein,
exactly one micro-exit optical lens group is arranged for each micro-entrance optical lens group,
wherein the microentrance optical lens group is designed and/or the microentrance optical lens group and the microexit optical lens group are arranged with each other such that substantially all light emitted from the microentrance optical lens group is incident only in the associated microexit optical lens group, and wherein light preformed by the microentrance optical lens group is imaged as at least one light distribution by the microexit optical lens group into a region in front of the motor vehicle,
wherein each micro-incidence optical lens group focuses light passing through the micro-incidence optical lens group into at least one micro-incidence optical lens group focus, wherein the micro-incidence optical lens group focus is positioned between the micro-incidence optical lens group and the micro-exit optical lens group arranged with the micro-incidence optical lens group, wherein at least one diaphragm device is arranged between the micro-incidence optical lens group and the micro-exit optical lens group,
wherein, the low beam micro-optical lens group is composed of at least a micro-incidence optical lens group, a micro-exit optical lens group and at least a diaphragm device between the micro-incidence optical lens group and the micro-exit optical lens group,
the at least one diaphragm device is provided for limiting the light distribution imaged by the respective micro-projection optical lens group in such a way that the light distribution emitted by the micro-projection optical lens group forms part of the light distribution of the low beam, wherein the diaphragm device for this purpose has at least one optically effective diaphragm edge which describes the course of the light-dark cut-off of the light distribution of the low beam.
The invention also relates to a micro-projection light module for a motor vehicle headlight, comprising at least one projection device according to the invention and at least one light source for supplying light into the projection device.
The invention further relates to a vehicle headlamp, in particular a motor vehicle headlamp, comprising at least one micro-projection light module according to the invention.
Background
For example, document AT 514967B 1, which describes a projection device of the type mentioned AT the outset, is known from the prior art. In this document, a projection device is shown which has a plurality of micro-entry and micro-exit optical lens groups, wherein a diaphragm device is arranged between the micro-entry and micro-exit optical lens groups. In order not to exceed the legal maximum of the light intensity in the light distribution, it is necessary to design the local intensity to be correspondingly low. In the micro-projection module, for this purpose, for example, a shading element is arranged in the projection lens, so that the illumination intensity at these points is low. Previous measures for dimming individual regions of the light distribution include the manipulation of the projection lens or the illumination device by means of a shading element. This has the disadvantage that the shading element intensely darkens the region to be shaded, and a completely uniform transition of the brightness into the non-darkened region cannot be achieved with such a shading element. The regions that are shaded in the light pattern can hitherto be clearly recognized with the naked eye as local minima of the intensity of the light distribution and thus have a negative effect on the overall impression of the light distribution.
Disclosure of Invention
The object of the invention is to overcome the aforementioned disadvantages of the prior art. This object is achieved by a projection device of the type mentioned at the outset, in which projection device the total number of low beam micro-optic lens groups comprises at least two groups of low beam micro-optic lens groups, i.e.,
a first group of low-beam micro-optics, at least one first variant with a diaphragm device, and
a second group of low beam micro-optics mirrors having at least one second variant of the diaphragm arrangement, wherein the design of the second variant of the diaphragm arrangement differs from the design of the first variant of the diaphragm arrangement at least in that the second variant of the diaphragm arrangement has
Shading elements (50L) protruding along a section of the course of the diaphragm edge and/or
A shading element (Segm 10) spaced apart from the diaphragm edge, which shading element is completely surrounded by the light-transmitting region of the diaphragm device.
By providing a diaphragm arrangement of at least two variants, the low beam light distribution can be influenced advantageously by a corresponding selection of the number and/or the design of the shading elements of the diaphragm arrangement or possibly provided therein in such a way that, on the one hand, the legal requirements with regard to the darkened region in the light distribution can be met and, at the same time, a uniform transition in the light distribution can be created.
An optically effective diaphragm edge refers to a diaphragm edge that intervenes in the imaging of the light distribution to limit the light distribution.
The expression "substantially all … emitted light" means here that at least a large part of all the luminous flux emitted by the microentrance optical system is intended to be emitted only into the associated microexit optical system. In particular, no light flux is injected into the adjacent micro-exit optical lens group, so that no adverse optical effects, such as stray light, which could lead to glare, etc., are produced.
Furthermore, the expression "wherein the microentrance optical lens system is designed in such a way and/or the microentrance optical lens system and the microexit optical lens system are arranged relative to one another in such a way" also means that additional measures, such as the provision of a diaphragm (see further below), can be provided, which either have their own function only or preferably have the function of aligning all luminous fluxes exactly with the associated microexit optical lens system in addition to their own function.
By using a plurality, majority or plurality of associated micro-optics instead of a single optics, such as in a conventional projection system, the focal length and size of the micro-optics itself are significantly smaller than in a "conventional" optics. The center thickness can also be reduced compared to conventional optical lens sets. The depth of the projection device can be significantly reduced compared to conventional optical lens systems.
By increasing the number of micro-optical lens array systems, the luminous flux can be increased or scaled, wherein the upper limit with respect to the number of micro-optical lens array systems is limited above all by the respective available production method. In order to produce a low beam function, for example, 200 to 400 micro-optical lens system systems may be sufficient or advantageous, wherein this number should not describe either the upper limit value or the lower limit value, but should be only an exemplary number. In order to increase the luminous flux, it is advantageous to increase the number of identical micro-optical lens groups. Conversely, a plurality of micro optical lens assemblies can be used to bring micro optical lens assemblies with different optical characteristics into a projection system, so as to generate or superimpose different light distributions. The plurality of micro-optic assemblies thus also allows construction possibilities that are not present in conventional optical assemblies.
Furthermore, such a light module is scalable, i.e. a plurality of light modules of identical or similar design can be assembled to form a larger overall system, for example to form a vehicle headlight.
In conventional projection systems with projection lenses, the lenses have a typical diameter between 60 mm and 90 mm. In the module according to the invention, the individual micro-optical lens system has typical dimensions of about 2 mm x 2 mm (in V and H) and a depth of about 6 mm-10 mm (in Z, see e.g. fig. 2), so that a significantly smaller depth of the module according to the invention is obtained in the Z-direction than in conventional modules.
The light modules or projection devices according to the invention can have a small overall depth and can be formed substantially freely, i.e. for example a first light module for generating a first partial light distribution can be designed separately from a second light module for a second partial light distribution and these light modules can be arranged relatively freely, i.e. vertically and/or horizontally and/or offset from one another by a certain depth, so that the design specification can also be implemented more simply.
Another advantage of the light module or projection device according to the invention is that an exact positioning of the light source with respect to the projection device is eliminated. Accurate positioning is not as critical as the distance of the illumination unit from the microlens array is not necessarily as accurate. Now, however, after the micro-entry and micro-exit optical mirrors have been optimally matched to one another, the inaccurate positioning of the actual light source is less critical, since these optical mirrors form a system to a certain extent. Real light sources are for example approximately point-like light sources, such as light emitting diodes, whose light is aligned in parallel by a collimator, such as a Compound Parabolic Concentrator (CPC) or a TIR lens (total internal reflection).
The projection device or the light module can also comprise additional micro-optical lens systems, by means of which other types of light distributions are produced as low beam light distributions. Here, the "specific type" of the light distribution refers to a light distribution generated in accordance with a relevant standard, for example, a light distribution generated in accordance with the UN/ECE regulation standard of countries in the european union, in particular, regulations 123 and 48 or relevant standards of other countries or regions.
The term "lane" is used in the following text only for the sake of simplicity, since the light pattern actually lies on the lane or extends also beyond the lane, depending of course on the local conditions. For example, in order to test the emitted light distribution, a projection of a light image for an automobile onto a vertical plane is generated according to relevant standards, for example according to the 123 th and 48 th regulations of the european economic commission of the united states (UN/ECE), namely "unified regulations on the certification of an adaptive front lighting system (AFS) for automobiles" and "unified regulations on the certification of vehicles in terms of installation of lighting devices and light signaling devices", according to the federal motor vehicle safety standard FMVSS, item 108 "lamps, reflectors and related equipment" (described in section 571.108 of subsection B of the federal motor vehicle standard in section 49, chapter V, 571 in the federal regulations CFR in the united states) and according to GB/T30036/2013 "adaptive front lighting system for automobiles", which are relevant to automotive lighting technology according to the national standards of the people's republic.
It is also generally possible for the first group to have a shading element. The independent claims of the present invention do not state that the first group does not necessarily have shading elements, but that the second group has at least one second variant of the diaphragm arrangement, which differs from the first variant, for example, in that a further type of shading elements is provided. Although the first group may of course likewise be free of shading elements.
It may be particularly advantageous in such a lighting device to provide two or more groups for generating different light distributions, wherein each group forms a different light distribution, for example selected from one of the following light distributions:
left) turn signal light distribution;
city light distribution;
road lamp light distribution;
light distribution of expressway lamps;
light distribution of additional lamps for highway lamps;
branch) curve light distribution;
near light front field light distribution;
light distribution for asymmetric dipped headlights in the far field;
light distribution for asymmetric dipped headlights in the far field in the cornering light pattern;
light distribution of a high beam light;
a) non-glare high beam light distribution.
An example of such a light distribution is also known from document AT 514967B 1.
It can be provided that each low-beam micro-optic lens group of the diaphragm arrangement with the second variant has exactly one shading element projecting along a section of the trend of the diaphragm edge. The shading elements here preferably extend in the vertical direction in order to shade a point "50L" of the light distribution. It is of course also possible to provide further shading elements which do not protrude from the edge of the diaphragm. A corresponding dimming of the 50L spot can be achieved, for example, by selecting a suitable number and size of low beam micro-optic lens groups with shading elements according to the second variant. The expression "protrudes from the diaphragm edge" means that the diaphragm edge is nevertheless still recognizable as a diaphragm edge for low beam light distribution. The longitudinal extent of the diaphragm edge, which is composed of horizontal or inclined straight diaphragm edge sections, is thus interrupted by the projecting shading elements. In other words, the diaphragm edges can no longer be recognized in the region of the completely opaque shading elements, since these diaphragm edges can no longer be seen as edges due to the presence of the protruding shading elements in this region. The diaphragm edge continues again (optically visible) before and after the shading element.
It can be advantageously provided that each low beam micro-optic lens group of the diaphragm device according to the second variant has exactly one shading element spaced apart from the diaphragm edge, which shading element is completely surrounded by the light-transmissive region of the diaphragm device. These shading elements can be arranged such that they cause shading within the segment 10 of the low beam light distribution. A correspondingly uniform and symmetrical dimming within the segment 10 can be achieved, for example, by selecting a low beam micro-optic mirror group with a suitable number and size of these shading elements.
It can be provided that the at least one diaphragm device is connected to a light-transmissive carrier, which is coated on its surface with an at least partially light-impermeable material in order to produce a light distribution that can be predetermined. The at least partially light-impermeable layer can be applied, for example, by means of a photolithographic method. It is also possible to provide a further diaphragm device on the other side of the carrier, for example to avoid stray light.
In order to particularly effectively and precisely predetermine the transition between the darkened and non-darkened regions, it can be provided that at least the individual shading element sections of the diaphragm device of the second variant are light-transmissive. The light transmission of the individual shading elements can also be varied.
Alternatively or in addition to this, it can also be provided that at least the individual shading elements of the diaphragm arrangement of the second variant are completely light-tight. The design of the overall shading can be varied by appropriately selecting the number of shading elements and the design.
Furthermore, it can be provided that the individual shading elements of the diaphragm device of the second variant are provided for limiting the illumination intensity of the light distribution in the 50L measuring point. The 50L measurement points are, for example, in an angle of 3.43 ° to the left (L) and 0.86 ° to the bottom (D). In the FMVSS specification, the measurement point not specifically labeled is 0.86 D3.5L.
Preferably, it can be provided that the individual shading elements are arranged such that they shade a region of the light distribution emitted by the respective low beam micro-optic lens group, wherein this region comprises a horizontal angle of at most 5 ° and a vertical angle of at most 5 °. The shaded regions may include horizontal and vertical angles of (1 ° or 2 °) to 5 ° and may, for example, be configured as circles.
Furthermore, it can be provided that the size of at least one shading element of the diaphragm arrangement of the second variant differs from the size of at least one shading element of the other diaphragm arrangement of the second variant. The expression "size" here refers to the area through which the respective shading element extends. Here, the shape is scalable. As an alternative to this, it is also possible for the shading elements to be shaped differently from one another, that is to say to exhibit different geometric figures.
Furthermore, it can be provided that the individual shading elements of the diaphragm device of the second variant are provided for limiting the illumination intensity of the light distribution within the segment 10 of the low beam light distribution. The expression "segment 10" refers to a line between 4.5L and 2R at a height of-4 ° (-4D).
Preferably, it can be provided that the individual shading elements are arranged such that they shade a region of the light distribution emitted by the respective low-beam light micro-optic lens group, wherein this region includes a horizontal angle of maximally 10 ° and a vertical angle of maximally 3 °. The width may thus be, for example, at most 10 ° and the height between 1 ° and 3 °, for example. This shading element can thus be configured as a floating beam, wherein the dimensions of the individual shading elements can be varied in order to produce a uniform transition. In this connection, it is particularly advantageous to manufacture such shading elements by means of a photolithographic process.
In particular, it can be provided that the carrier of at least one diaphragm device is made of glass. Furthermore, it can be provided that the entry and exit optical lens elements are firmly connected to at least one carrier of the diaphragm arrangement which is arranged between the entry and exit optical lens elements. This minimizes undesired effects, for example due to thermal expansion, and ensures a permanent and precise positioning of the entry optical lens system with respect to the exit optical lens system or of the exit optical lens system with respect to the entry optical lens system. For this purpose, it can be advantageously provided that the fixed connections of the entry and exit optics to the at least one carrier are each designed as a transparent adhesive connection.
In addition, it can be provided that the total number of low beam micro-optics groups comprises a third group of low beam micro-optics groups of the diaphragm arrangement of the third variant in which
At least one at least partially light-transmitting window is formed in the light-blocking region of the diaphragm arrangement, which forms the diaphragm edge, for the purpose of forming a light distribution above the bright-dark cut-off. This region above the bright-dark cut-off is thus illuminated, so that, for example, a better identification of the guideboard is possible. Such a light function is often referred to as "indicator light", wherein the intensity of the illumination in this region can be determined by the design of the light-transmitting window and by the number of low beam micro-optic lenses of the third variant. In addition, a combination of the low beam micro-optic lens group of the third variant with the low beam micro-optic lens group of the first or second variant is also possible.
All embodiments of the invention can generally also be specified in connection with the generation of a front field light distribution.
In general, it can be provided that different groups (e.g., at least two) of low beam micro-optics have differently configured diaphragm arrangements or (e.g., at least two) differently sized shading elements, wherein the photometrically determined regions shaded by the shading elements at least partially overlap. This may apply to the shading elements of the first, second and/or third variant or group. In particular, it can be provided that the shaded photometric region of the smaller shading element is completely accommodated in the shaded photometric region of the lower, larger shading element or that the shading elements can be designed such that this effect occurs.
The invention also relates to a micro-projection light module for a motor vehicle headlight, comprising at least one projection device according to the invention and at least one light source for supplying light into the projection device. Preferably, each low beam micro-optic lens group is provided with an LED light source.
The invention further relates to a vehicle headlamp, in particular a motor vehicle headlamp, comprising at least one micro-projection light module according to the invention.
The invention also relates to a vehicle, in particular a motor vehicle, having at least one vehicle headlamp according to the invention.
Drawings
The invention will be explained in detail below with the aid of exemplary and non-limiting embodiments that are illustrated in the accompanying drawings. In the figure:
FIG. 1 illustrates exemplary imaging of low beam light distribution in accordance with the prior art;
FIG. 2 shows a schematic view of an exemplary projection device;
fig. 3a to d show schematic diagrams of a method for applying a diaphragm arrangement to a transparent carrier that can be connected to a micro-entry optical lens group and a micro-exit optical lens group;
fig. 4a shows an exemplary embodiment of a diaphragm arrangement arranged side by side according to the prior art;
fig. 4b shows the light distribution produced by the device according to fig. 4 a;
fig. 5a shows a schematic illustration of an embodiment according to the invention of a diaphragm device according to a first and a second variant, which are arranged next to one another;
FIG. 5b shows a light distribution generated by means of a projection device comprising the diaphragm arrangement according to FIG. 5 a;
fig. 6a shows a further schematic illustration of the inventive design of a diaphragm arrangement according to a first and a second variant, which are arranged next to one another; and is provided with
Fig. 6b shows a light distribution generated by means of a projection device comprising the diaphragm arrangement according to fig. 6 a.
In the following drawings, the same reference numerals denote the same features unless otherwise specified.
Detailed Description
Fig. 1 shows an exemplary imaging of a cross section of a low beam light distribution according to the prior art. The brightness within the light distribution is represented by contours, which mark areas of equal illumination intensity. In the present illustration, the illumination intensity occupies a maximum approximately below the bright-dark cut-off and decreases outward. The behavior of the bright-dark cut-off can be clearly seen here. In the left-hand region, a downward projection is visible near the bright-dark cut-off, within which projection the contours are in particular approximately side by side. The measurement point 50L is located in this region, which is correspondingly darkened, wherein the darkening in the light pattern is not uniform and is therefore configured to be clearly visible, as can be seen by means of a strong gradient of the illumination intensity in the region of the measurement point 50L.
Fig. 2 shows a schematic illustration of an exemplary projection device 1 in a micro-projection light module 6, wherein the projection device 1 can be equipped with an embodiment of the diaphragm device according to the invention as will be discussed below. The projection device 1 according to the invention equipped in this way is suitable for use in a motor vehicle headlight, wherein the projection device 1 is provided for imaging the light of at least one light source 2 (preferably, however, an individually controllable light source, particularly preferably an LED, is associated with each micro-entry optical lens group 3 a) associated with the projection device 1 in the region in front of the motor vehicle in the form of at least one light distribution, namely a low beam light distribution and/or a front field light distribution. The light emitted by the light source 2 can be passed on to the set of entrance optics 3, for example, by means of a collimator 7. The projection apparatus 1 includes: an incident optical lens group 3 having a total number of micro incident optical lens groups 3a preferably arranged in one array; an exit optical lens group 4 having a total number of micro exit optical lens groups 4a preferably arranged in an array; wherein exactly one micro-exit optical lens group 4a is provided for each micro-entrance optical lens group 3 a.
The microentrance optical lens group 3a is designed and/or the microentrance optical lens group 3a and the microexit optical lens group 4a are arranged relative to each other in such a way that substantially all light exiting the microentrance optical lens group 3a is incident only on the associated microexit optical lens group 4a, and the light preformed by the microentrance optical lens group 3a is imaged as at least one light distribution by the microexit optical lens group 4a into the region in front of the motor vehicle. Each microentrance optical lens group 3a is designed such that the microentrance optical lens group 3a focuses light passing through the microentrance optical lens group into at least one microentrance optical lens group focus, wherein the microentrance optical lens group focus is located between the microentrance optical lens group 3a and the associated microexit optical lens group 4a, wherein at least one diaphragm device 8a (see fig. 3) is arranged between the microentrance optical lens group 3a and the associated microexit optical lens group 4a, wherein each microentrance optical lens group is formed at least by the microentrance optical lens group 3a, the associated microexit optical lens group 4a and the at least one diaphragm device 8a located therebetween.
The at least one diaphragm device 8a is provided to limit the light distribution imaged by the respective micro-exit optical lens group 4a in such a way that the light distribution emitted by the micro-exit optical lens group 4a forms part of the low beam light distribution, wherein the diaphragm device 8a has at least one optically effective diaphragm edge K (see fig. 4a, 5a and 6 a) which describes the course of the light-dark cut-off of the low beam light distribution.
The total number of the low beam micro-optical lens groups comprises at least two groups of low beam micro-optical lens groups, i.e.
A first group of low-beam micro-optics, at least one first variant with a diaphragm device 8 a' (see fig. 4 a), and
-a second set of low-beam micro-optical mirror groups, with at least one second variant of diaphragm means 8a ' (see fig. 6 a), wherein the design of the second variant of diaphragm means 8a ' is different from that of the first variant of diaphragm means 8a ' at least in that it is such that the second variant of diaphragm means 8a ' has the same design as the first variant of diaphragm means 8a '
Shading elements a50L protruding along a section of the course of the diaphragm edge (see fig. 5a, furthermore, it is also possible to shade the segment a50L at least partially by floating shading elements), and/or
A shading element ASegm10 (see fig. 6 a) spaced from the diaphragm edge K, which is completely surrounded by the light-transmissive region of the diaphragm arrangement 8a ″.
Fig. 3 (a) to (d) show schematic diagrams of the individual steps of a method for producing a projection device 1 according to the invention for a motor vehicle headlight, wherein the projection device 1 is provided for imaging light of at least one light source 2 assigned to the projection device 1 in the region of a motor vehicle front in the form of at least one light distribution. Fig. 3 (a) shows a carrier 5 with a first flat side 5a, to which carrier in fig. 3 (b) a first diaphragm device 8a is applied, for example by screen printing or metal evaporation, wherein the carrier 5 is at least partially made of glass. Fig. 3 (c) shows a next step b) of the method, namely, fixing an entrance optical lens group 3 having a plurality of microentrance optical lens groups 3a, preferably arranged in an array, on the first flat side 5a of the carrier 5, wherein the entrance optical lens group 3 at least partially covers the first aperture device 8a and is arranged such that light can be at least partially incident into the carrier 5 via the entrance optical lens group 3 through the first aperture device 8a, and the entrance optical lens group 3 is fixed on the first flat side 5a of the carrier 5 by means of a light-permeable adhesive. Fig. 3 (d) shows a state in which the incident optical lens group 3 has been firmly connected to the bracket 5. A second diaphragm device can then be applied to the second flat side 5b of the carrier 5 opposite the first flat side 5a, for example, to avoid stray light, in accordance with step c). The exit optical lens group 4 can then be attached to the opposite flat side of the carrier 5.
Fig. 4a shows an exemplary embodiment of a diaphragm arrangement 8 a' arranged side by side according to the prior art and fig. 4b shows the light distribution produced thereby. Where it can be seen that point 50L is not darkened.
Fig. 5a shows a schematic representation of the design according to the invention of side-by-side arranged diaphragm devices 8a 'and 8 a', wherein diaphragm devices 8a 'have a shading element a50L, which is arranged around measurement point 50L in order to darken the region, wherein shading elements a50L of the respective diaphragm devices 8 a' can be designed differently in order to produce a luminance transition that is as uniform as possible. Fig. 5b shows a light distribution which is produced by means of a projection device 1 comprising the diaphragm arrangement according to fig. 5 a. In comparison with the light distribution according to fig. 1, it is particularly clear that the light distribution according to fig. 5a, although likewise darkens in the measuring point 50L, has a clearly more uniform transition into the surroundings.
Fig. 6a shows a further schematic illustration of the design according to the invention of the diaphragm arrangements 8a 'and 8 a' arranged side by side. In the figure, individual light-shielding elements ASegm10 are now provided, which are spaced apart from the diaphragm edge K and are completely surrounded by the light-transmitting regions of the diaphragm arrangement 8a ″. These shading elements Asegm10 may be provided separately in the second variant of the diaphragm arrangement 8 a' or in combination with the shading elements a 50L. In embodiment 6a, a diaphragm (not shown in the figures) is also provided, which diaphragm has no shading elements. That is to say, there is also a diaphragm without shading the segments 10 and 50L. The number and size and geometry of the shading elements can generally be selected according to the desired design of the light distribution to be produced.
Fig. 6b shows a light distribution generated by means of a projection device comprising the diaphragm arrangement according to fig. 6 a. In addition to the shading measurement point 50L, an additional darkening in the region of the segment 10 of the light distribution is also achieved in the figure, wherein a uniform brightness transition is also created here.
In principle, the reduction possibilities can be arranged arbitrarily on the array. It is also possible that the legal point of view changes. In severe weather lighting (class W) of AFS functions, for example, the upper legal limit (for example for segment 10) is lower than in class C. The opposite is true for 50L. Under inclement weather lighting, this may be significantly higher than class C. If one now deliberately places only the segments 10, i.e. lines, behind the collimator, the relevant collimator can be switched on in bad weather, but for this reason the collimator without the segments 10, i.e. lines, can be switched off in the relevant system. The total luminous flux is thus maintained, but the segments 10, i.e. the lines, decrease in the total light distribution. One can just treat the 50L measurement points in the opposite way.
On the basis of this teaching, a person skilled in the art will be able to obtain other embodiments of the invention not shown without inventive activity. The invention is not limited to the embodiments shown. Various aspects of the invention or embodiments may also be considered and combined with each other. What is important is the idea on which the invention is based, which can be implemented in various ways by a person skilled in the art with the understanding of the present description and which should nevertheless be maintained.
Claims (20)
1. Projection device (1) for a motor vehicle headlight, wherein the projection device (1) is provided for imaging light of at least one light source (2) associated with the projection device (1) in the region in front of the motor vehicle in the form of at least one light distribution, namely a low beam light distribution, wherein the projection device (1) comprises:
-an incident optical lens group (3) with a total number of micro-incident optical lens groups (3 a)
-an exit optical lens group (4) with a total number of micro exit optical lens groups (4 a), wherein,
exactly one micro-exit optical lens group (4 a) is arranged for each micro-entrance optical lens group (3 a),
wherein the microentrance optical lens group (3 a) is designed and/or the microentrance optical lens group (3 a) and the microexit optical lens group (4 a) are arranged relative to each other such that all light emerging from the microentrance optical lens group (3 a) is incident only on the associated microexit optical lens group (4 a), and wherein,
the light preformed by the micro-incidence optical lens group (3 a) is imaged into the area in front of the motor vehicle by the micro-emergence optical lens group (4 a) as at least one light distribution,
wherein each micro-entry optical mirror group (3 a) focuses light passing through said micro-entry optical mirror group into at least one micro-entry optical mirror group focus, wherein the micro-entry optical mirror group focus is located between the micro-entry optical mirror group (3 a) and the provided micro-exit optical mirror group (4 a), wherein at least one diaphragm device (8 a' ) is arranged between the micro-entry optical mirror group (3 a) and the micro-exit optical mirror group (4 a),
wherein the low-beam micro-optics are each constituted by at least a micro-entry optics (3 a), an associated micro-exit optics (4 a) and at least one diaphragm device (8 a' ) interposed therebetween,
wherein at least one diaphragm device (8 a ') is arranged for limiting the light distribution imaged by the respective micro-extraction optic (4 a) such that the light distribution emitted by the micro-extraction optic (4 a) constitutes part of the low-beam light distribution, wherein the diaphragm device (8 a' ) for this purpose has at least one optically effective diaphragm edge (K) depicting a contour of a light-dark cut of the low-beam light distribution,
it is characterized in that the preparation method is characterized in that,
the total number of the low beam micro-optical lens groups comprises at least two groups of low beam micro-optical lens groups, namely,
-a first group of low-beam micro-optics lens, at least one first variant with diaphragm means (8 a'), and
-a second group of low-beam micro-optical mirror groups, provided with at least one second variant of diaphragm means (8 a '), wherein the design of the second variant of diaphragm means (8 a ') differs at least in that it differs from the design of the first variant of diaphragm means (8 a ') in such a way that the second variant of diaphragm means (8 a ') has the same design as the first variant of diaphragm means (8 a ')
Shading elements (A50L) protruding along a section of the course of the diaphragm edge (K) and/or
-a shading element (ASegm 10) spaced apart from the diaphragm edge (K), said shading element being completely surrounded by a light-transmissive region of the diaphragm device (8 a').
2. The projection device (1) according to claim 1, wherein each passing-light micro-optic group with the diaphragm device (8 a') of the second variant has exactly one shading element (a 50L) projecting along a section of the trend of said diaphragm edge (K).
3. The projection device (1) according to claim 1 or 2, wherein each low-light micro-optic mirror group of the diaphragm device (8 a ') with the second variant has exactly one obscuration element (ASegm 10) spaced from said diaphragm edge (K), said obscuration element being completely surrounded by the light-transmissive region of said diaphragm device (8 a').
4. The projection device (1) according to claim 1 or 2, wherein said at least one diaphragm device (8 a' ) is connected to a light-transmissive bracket (5) which is coated on its surface with an at least partially light-opaque material in order to form a light-transmissive predetermined light distribution.
5. A projection device (1) according to claim 1 or 2, wherein at least the portions of the respective shading elements (a 50L, ASegm 10) of the diaphragm device (8 a') of the second variant are light-transmissive.
6. The projection device (1) according to claim 1 or 2, wherein at least each shading element (a 50L, ASegm 10) of the diaphragm arrangement (8 a') of the second variant is completely light-tight.
7. The projection apparatus (1) according to claim 1 or 2, wherein at least each shading element (a 50L) of the diaphragm arrangement (8 a') of the second variant is provided for limiting the illumination intensity of the light distribution within the 50L measurement points.
8. The projection apparatus (1) according to claim 7, wherein each shading element (A50L) is arranged such that it shades an area of the light distribution emitted by the corresponding low beam micro-optic, wherein said area comprises a horizontal angle of maximum 5 ° and a vertical angle of maximum 5 °.
9. The projection apparatus (1) according to claim 1 or 2, wherein the dimensions of the at least one shading element (a 50L, ASegm 10) of the diaphragm device (8 a ') of the second variant deviate from the dimensions of the at least one shading element (a 50L, ASegm 10) of the other diaphragm device (8 a') of the second variant.
10. The projection apparatus (1) according to claim 1 or 2, wherein the respective shading elements (a 50L, ASegm 10) of the diaphragm arrangement (8 a') of the second variant are provided for limiting the illumination intensity of the light distribution within the segment 10 of the low-beam light distribution.
11. A projection device (1) according to claim 10, wherein each shading element (a 50L, ASegm 10) is arranged such that it shades an area of the light distribution emitted by the corresponding low beam micro-optic lens group, wherein said area comprises a horizontal angle of maximum 10 ° and a vertical angle of maximum 3 °.
12. The projection apparatus (1) according to claim 1 or 2, wherein the bracket (5) of the at least one diaphragm device (8 a' ) is made of glass.
13. A projection device (1) as claimed in claim 1 or 2, in which the total number of low-beam micro-optical lens groups comprises a third group of low-beam micro-optical lens groups of the diaphragm device of the third variant, wherein, in the diaphragm device of the third variant,
at least one at least partially light-transmitting window is formed in a light-blocking region of the diaphragm device, said window forming a diaphragm edge (K), for forming a light distribution above a bright-dark cut-off.
14. A projection device (1) according to claim 1, wherein said micro-entrance optical lens group (3 a) is arranged in an array.
15. A projection device (1) according to claim 1, wherein said micro-exit optical lens group (4 a) is arranged in an array.
16. The projection apparatus (1) according to claim 12, wherein said entrance optical lens group (3) and said exit optical lens group (4) are each rigidly connected to at least one carriage (5) of said diaphragm device (8 a' ) arranged between said entrance optical lens group (3) and said exit optical lens group (4).
17. Projection apparatus (1) according to claim 16, wherein the secure connection of the entry optics (3) and the exit optics (4) to the at least one carrier (5) is in each case designed as a transparent adhesive connection.
18. Micro-projection light module (6) for a motor vehicle headlight, comprising at least one projection device (1) according to one of claims 1 to 17 and at least one light source (2) for feeding light into the projection device (1).
19. Vehicle headlamp comprising at least one projection device according to one of claims 1 to 17 and/or a micro-projection light module (6) according to claim 18.
20. The vehicle headlamp of claim 19, wherein the vehicle headlamp is a motor vehicle headlamp.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP17205400.9A EP3495718A1 (en) | 2017-12-05 | 2017-12-05 | Projection device for a motor vehicle headlight |
| EP17205400.9 | 2017-12-05 | ||
| PCT/EP2018/082657 WO2019110369A1 (en) | 2017-12-05 | 2018-11-27 | Projection device for a motor vehicle headlight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111492173A CN111492173A (en) | 2020-08-04 |
| CN111492173B true CN111492173B (en) | 2022-09-13 |
Family
ID=60627443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880078628.XA Active CN111492173B (en) | 2017-12-05 | 2018-11-27 | Projection device for a motor vehicle headlight |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20200370726A1 (en) |
| EP (2) | EP3495718A1 (en) |
| JP (1) | JP6964777B2 (en) |
| KR (1) | KR102410894B1 (en) |
| CN (1) | CN111492173B (en) |
| WO (1) | WO2019110369A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102348900B1 (en) | 2020-06-29 | 2022-01-11 | 에스엘 주식회사 | Lamp for vehicle |
| KR20220021309A (en) * | 2020-08-13 | 2022-02-22 | 현대모비스 주식회사 | Lamp for automobile and automobile including the same |
| CN116697296B (en) * | 2023-08-03 | 2023-10-13 | 常州星宇车灯股份有限公司 | light source coupling structure |
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| CN102537807A (en) * | 2010-11-11 | 2012-07-04 | 通用汽车环球科技运作公司 | Head lamp assembly and method for controlling the same |
| CN104100902A (en) * | 2013-04-11 | 2014-10-15 | 汽车照明罗伊特林根有限公司 | Light module for a motor vehicle lighting device |
| CN104121535A (en) * | 2013-04-29 | 2014-10-29 | 汽车照明罗伊特林根有限公司 | Light module for a motor vehicle headlamp |
| CN105637287A (en) * | 2013-10-25 | 2016-06-01 | 齐扎拉光系统有限责任公司 | Microprojection lighting module for a motor vehicle headlight |
| WO2017157624A1 (en) * | 2016-03-16 | 2017-09-21 | Bayerische Motoren Werke Aktiengesellschaft | Floodlight for a motor vehicle |
| DE102016112617B3 (en) * | 2016-07-08 | 2017-10-26 | Automotive Lighting Reutlingen Gmbh | Motor vehicle headlight with a small overall depth |
| CN107407471A (en) * | 2015-04-10 | 2017-11-28 | Zkw集团有限责任公司 | Lighting device with shadow shield |
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| JPH046084Y2 (en) * | 1987-03-31 | 1992-02-20 | ||
| CA2562438A1 (en) * | 2004-04-08 | 2005-10-27 | Federal-Mogul Corporation | Projector lamp headlight with chromatic aberration correction |
| EP2157362A1 (en) * | 2008-08-11 | 2010-02-24 | Hella KG Hueck & Co. | Projection headlight assembly for vehicles |
| JP5423159B2 (en) * | 2009-06-04 | 2014-02-19 | スタンレー電気株式会社 | Vehicle lighting |
| AT509821B1 (en) * | 2010-04-22 | 2013-08-15 | Zizala Lichtsysteme Gmbh | HEADLIGHTS FOR VEHICLES |
| KR102310285B1 (en) * | 2014-10-30 | 2021-10-07 | 현대모비스 주식회사 | Lamp Apparatus Of Vehicle |
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2017
- 2017-12-05 EP EP17205400.9A patent/EP3495718A1/en not_active Withdrawn
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2018
- 2018-11-27 CN CN201880078628.XA patent/CN111492173B/en active Active
- 2018-11-27 JP JP2020530495A patent/JP6964777B2/en active Active
- 2018-11-27 WO PCT/EP2018/082657 patent/WO2019110369A1/en unknown
- 2018-11-27 KR KR1020207019121A patent/KR102410894B1/en active IP Right Grant
- 2018-11-27 EP EP18811492.0A patent/EP3721134B1/en active Active
- 2018-11-27 US US16/769,696 patent/US20200370726A1/en not_active Abandoned
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537807A (en) * | 2010-11-11 | 2012-07-04 | 通用汽车环球科技运作公司 | Head lamp assembly and method for controlling the same |
| CN104100902A (en) * | 2013-04-11 | 2014-10-15 | 汽车照明罗伊特林根有限公司 | Light module for a motor vehicle lighting device |
| CN104121535A (en) * | 2013-04-29 | 2014-10-29 | 汽车照明罗伊特林根有限公司 | Light module for a motor vehicle headlamp |
| CN105637287A (en) * | 2013-10-25 | 2016-06-01 | 齐扎拉光系统有限责任公司 | Microprojection lighting module for a motor vehicle headlight |
| CN107407471A (en) * | 2015-04-10 | 2017-11-28 | Zkw集团有限责任公司 | Lighting device with shadow shield |
| WO2017157624A1 (en) * | 2016-03-16 | 2017-09-21 | Bayerische Motoren Werke Aktiengesellschaft | Floodlight for a motor vehicle |
| DE102016112617B3 (en) * | 2016-07-08 | 2017-10-26 | Automotive Lighting Reutlingen Gmbh | Motor vehicle headlight with a small overall depth |
Also Published As
| Publication number | Publication date |
|---|---|
| US20200370726A1 (en) | 2020-11-26 |
| EP3721134B1 (en) | 2023-02-15 |
| EP3495718A1 (en) | 2019-06-12 |
| EP3721134A1 (en) | 2020-10-14 |
| KR20200087867A (en) | 2020-07-21 |
| JP2021506068A (en) | 2021-02-18 |
| JP6964777B2 (en) | 2021-11-10 |
| WO2019110369A1 (en) | 2019-06-13 |
| KR102410894B1 (en) | 2022-06-22 |
| CN111492173A (en) | 2020-08-04 |
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